https://nhuantranduc.dev/blog All about Data and Artifical Intelligence en-us tranducnhuan@hotmail.com (Steve Tran) tranducnhuan@hotmail.com (Steve Tran) Sat, 28 Mar 2026 00:00:00 GMT https://nhuantranduc.dev/blog/x-algorithm-part-2 https://nhuantranduc.dev/blog/x-algorithm-part-2 How X built a reusable, trait-based pipeline framework in Rust that separates orchestration from business logic — with clever error handling that prioritizes availability over correctness. Sat, 28 Mar 2026 00:00:00 GMT tranducnhuan@hotmail.com (Steve Tran) x-algorithmrustsystem-designrecommendation-system https://nhuantranduc.dev/blog/x-algorithm-part-3 https://nhuantranduc.dev/blog/x-algorithm-part-3 How X finds ~200 candidate posts from billions in milliseconds — Thunder keeps in-network posts in memory, while Phoenix Retrieval uses a two-tower transformer to discover out-of-network content via embedding similarity search. Sun, 29 Mar 2026 00:00:00 GMT tranducnhuan@hotmail.com (Steve Tran) x-algorithmrecommendation-systemmachine-learningrust https://nhuantranduc.dev/blog/x-algorithm-part-5 https://nhuantranduc.dev/blog/x-algorithm-part-5 How X transforms raw ML predictions into a polished, personalized feed — the four-scorer chain, 10 pre-scoring filters, and the waterfall that reduces ~200 candidates to ~40 ranked posts. Fri, 03 Apr 2026 00:00:00 GMT tranducnhuan@hotmail.com (Steve Tran) x-algorithmrecommendation-systemsystem-designrust